为Athlete 类增加append 和extend 的方法

其实athlete 用到了很多 list的方法,

Author: Fox.Lee

17-p199.py

@@ -0,0 +1,51 @@
+class Athlete:
+     def __init__(self,a_name,a_dob=None,a_times=[]):
+          self.name = a_name
+          self.dob= a_dob
+          self.times = a_times
+
+     def top3(self):
+          return (sorted(set([sanitize(t) for t in self.times]))[0:3])
+
+     def add_time(self,time):
+          self.times.append(time)
+
+     def add_times(self,time=[]):
+          #for t in time:
+               #self.times.append(t)
+          self.times.extend(time)
+     
+          
+          
+
+def sanitize(time_string): #序列化得到的无规则数据,将其格式化为 mins.secs 的格式
+     if '-' in time_string:
+          splitter = '-'
+     elif ':' in time_string:
+          splitter = ':'
+     else:
+          return(time_string)
+     (mins,secs)=time_string.split(splitter)
+     return(mins+'.'+secs)
+
+def load_from_file(filename): #读取文件的一行(这个文件只有一行,多行咋办)
+     try:
+          with open (filename) as f:
+               data = f.readline()
+               templ = data.strip().split(',')
+               return (Athlete(templ.pop(0),templ.pop(0),templ))#返回一个Athlete对象
+     except IOError as err:
+          print('File Error: '+str(err))
+          return (None)
+
+sarah = load_from_file('sarah2.txt')
+
+print(sarah.name +"'s fastest times are: "+str(sarah.top3()))
+
+sarah.add_time('2:20')
+print(sarah.times)
+
+sarah.add_times(['2:15','1:20','2-33'])
+print(sarah.times)
+
+print(sarah.name +"'s fastest times are: "+str(sarah.top3()))